s390: move cacheinfo sysfs to generic cacheinfo infrastructure
This patch removes the redundant sysfs cacheinfo code by reusing
the newly introduced generic cacheinfo infrastructure through the
commit 246246cbde
("drivers: base: support cpu cache information
interface to userspace via sysfs")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
parent
e6a67ad0e2
commit
d97d929f06
|
@ -5,37 +5,11 @@
|
|||
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
||||
*/
|
||||
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/cacheinfo.h>
|
||||
#include <asm/facility.h>
|
||||
|
||||
struct cache {
|
||||
unsigned long size;
|
||||
unsigned int line_size;
|
||||
unsigned int associativity;
|
||||
unsigned int nr_sets;
|
||||
unsigned int level : 3;
|
||||
unsigned int type : 2;
|
||||
unsigned int private : 1;
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
struct cache_dir {
|
||||
struct kobject *kobj;
|
||||
struct cache_index_dir *index;
|
||||
};
|
||||
|
||||
struct cache_index_dir {
|
||||
struct kobject kobj;
|
||||
int cpu;
|
||||
struct cache *cache;
|
||||
struct cache_index_dir *next;
|
||||
};
|
||||
|
||||
enum {
|
||||
CACHE_SCOPE_NOTEXISTS,
|
||||
CACHE_SCOPE_PRIVATE,
|
||||
|
@ -44,10 +18,10 @@ enum {
|
|||
};
|
||||
|
||||
enum {
|
||||
CACHE_TYPE_SEPARATE,
|
||||
CACHE_TYPE_DATA,
|
||||
CACHE_TYPE_INSTRUCTION,
|
||||
CACHE_TYPE_UNIFIED,
|
||||
CTYPE_SEPARATE,
|
||||
CTYPE_DATA,
|
||||
CTYPE_INSTRUCTION,
|
||||
CTYPE_UNIFIED,
|
||||
};
|
||||
|
||||
enum {
|
||||
|
@ -70,39 +44,59 @@ struct cache_info {
|
|||
};
|
||||
|
||||
#define CACHE_MAX_LEVEL 8
|
||||
|
||||
union cache_topology {
|
||||
struct cache_info ci[CACHE_MAX_LEVEL];
|
||||
unsigned long long raw;
|
||||
};
|
||||
|
||||
static const char * const cache_type_string[] = {
|
||||
"Data",
|
||||
"",
|
||||
"Instruction",
|
||||
"Data",
|
||||
"",
|
||||
"Unified",
|
||||
};
|
||||
|
||||
static struct cache_dir *cache_dir_cpu[NR_CPUS];
|
||||
static LIST_HEAD(cache_list);
|
||||
static const enum cache_type cache_type_map[] = {
|
||||
[CTYPE_SEPARATE] = CACHE_TYPE_SEPARATE,
|
||||
[CTYPE_DATA] = CACHE_TYPE_DATA,
|
||||
[CTYPE_INSTRUCTION] = CACHE_TYPE_INST,
|
||||
[CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED,
|
||||
};
|
||||
|
||||
void show_cacheinfo(struct seq_file *m)
|
||||
{
|
||||
struct cache *cache;
|
||||
int index = 0;
|
||||
int cpu = smp_processor_id(), idx;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
struct cacheinfo *cache;
|
||||
|
||||
list_for_each_entry(cache, &cache_list, list) {
|
||||
seq_printf(m, "cache%-11d: ", index);
|
||||
for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
|
||||
cache = this_cpu_ci->info_list + idx;
|
||||
seq_printf(m, "cache%-11d: ", idx);
|
||||
seq_printf(m, "level=%d ", cache->level);
|
||||
seq_printf(m, "type=%s ", cache_type_string[cache->type]);
|
||||
seq_printf(m, "scope=%s ", cache->private ? "Private" : "Shared");
|
||||
seq_printf(m, "size=%luK ", cache->size >> 10);
|
||||
seq_printf(m, "line_size=%u ", cache->line_size);
|
||||
seq_printf(m, "associativity=%d", cache->associativity);
|
||||
seq_printf(m, "scope=%s ",
|
||||
cache->disable_sysfs ? "Shared" : "Private");
|
||||
seq_printf(m, "size=%dK ", cache->size >> 10);
|
||||
seq_printf(m, "line_size=%u ", cache->coherency_line_size);
|
||||
seq_printf(m, "associativity=%d", cache->ways_of_associativity);
|
||||
seq_puts(m, "\n");
|
||||
index++;
|
||||
}
|
||||
}
|
||||
|
||||
static inline enum cache_type get_cache_type(struct cache_info *ci, int level)
|
||||
{
|
||||
if (level >= CACHE_MAX_LEVEL)
|
||||
return CACHE_TYPE_NOCACHE;
|
||||
|
||||
ci += level;
|
||||
|
||||
if (ci->scope != CACHE_SCOPE_SHARED && ci->scope != CACHE_SCOPE_PRIVATE)
|
||||
return CACHE_TYPE_NOCACHE;
|
||||
|
||||
return cache_type_map[ci->type];
|
||||
}
|
||||
|
||||
static inline unsigned long ecag(int ai, int li, int ti)
|
||||
{
|
||||
unsigned long cmd, val;
|
||||
|
@ -113,277 +107,79 @@ static inline unsigned long ecag(int ai, int li, int ti)
|
|||
return val;
|
||||
}
|
||||
|
||||
static int __init cache_add(int level, int private, int type)
|
||||
static void ci_leaf_init(struct cacheinfo *this_leaf, int private,
|
||||
enum cache_type type, unsigned int level)
|
||||
{
|
||||
struct cache *cache;
|
||||
int ti;
|
||||
int ti, num_sets;
|
||||
int cpu = smp_processor_id();
|
||||
|
||||
cache = kzalloc(sizeof(*cache), GFP_KERNEL);
|
||||
if (!cache)
|
||||
return -ENOMEM;
|
||||
if (type == CACHE_TYPE_INSTRUCTION)
|
||||
if (type == CACHE_TYPE_INST)
|
||||
ti = CACHE_TI_INSTRUCTION;
|
||||
else
|
||||
ti = CACHE_TI_UNIFIED;
|
||||
cache->size = ecag(EXTRACT_SIZE, level, ti);
|
||||
cache->line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
|
||||
cache->associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
|
||||
cache->nr_sets = cache->size / cache->associativity;
|
||||
cache->nr_sets /= cache->line_size;
|
||||
cache->private = private;
|
||||
cache->level = level + 1;
|
||||
cache->type = type - 1;
|
||||
list_add_tail(&cache->list, &cache_list);
|
||||
return 0;
|
||||
|
||||
this_leaf->level = level + 1;
|
||||
this_leaf->type = type;
|
||||
this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
|
||||
this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY,
|
||||
level, ti);
|
||||
this_leaf->size = ecag(EXTRACT_SIZE, level, ti);
|
||||
|
||||
num_sets = this_leaf->size / this_leaf->coherency_line_size;
|
||||
num_sets /= this_leaf->ways_of_associativity;
|
||||
this_leaf->number_of_sets = num_sets;
|
||||
cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);
|
||||
if (!private)
|
||||
this_leaf->disable_sysfs = true;
|
||||
}
|
||||
|
||||
static void __init cache_build_info(void)
|
||||
int init_cache_level(unsigned int cpu)
|
||||
{
|
||||
struct cache *cache, *next;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
unsigned int level = 0, leaves = 0;
|
||||
union cache_topology ct;
|
||||
int level, private, rc;
|
||||
enum cache_type ctype;
|
||||
|
||||
if (!this_cpu_ci)
|
||||
return -EINVAL;
|
||||
|
||||
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
|
||||
for (level = 0; level < CACHE_MAX_LEVEL; level++) {
|
||||
switch (ct.ci[level].scope) {
|
||||
case CACHE_SCOPE_SHARED:
|
||||
private = 0;
|
||||
do {
|
||||
ctype = get_cache_type(&ct.ci[0], level);
|
||||
if (ctype == CACHE_TYPE_NOCACHE)
|
||||
break;
|
||||
case CACHE_SCOPE_PRIVATE:
|
||||
private = 1;
|
||||
break;
|
||||
default:
|
||||
return;
|
||||
}
|
||||
if (ct.ci[level].type == CACHE_TYPE_SEPARATE) {
|
||||
rc = cache_add(level, private, CACHE_TYPE_DATA);
|
||||
rc |= cache_add(level, private, CACHE_TYPE_INSTRUCTION);
|
||||
/* Separate instruction and data caches */
|
||||
leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1;
|
||||
} while (++level < CACHE_MAX_LEVEL);
|
||||
|
||||
this_cpu_ci->num_levels = level;
|
||||
this_cpu_ci->num_leaves = leaves;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int populate_cache_leaves(unsigned int cpu)
|
||||
{
|
||||
unsigned int level, idx, pvt;
|
||||
union cache_topology ct;
|
||||
enum cache_type ctype;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
|
||||
|
||||
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
|
||||
for (idx = 0, level = 0; level < this_cpu_ci->num_levels &&
|
||||
idx < this_cpu_ci->num_leaves; idx++, level++) {
|
||||
if (!this_leaf)
|
||||
return -EINVAL;
|
||||
|
||||
pvt = (ct.ci[level].scope == CACHE_SCOPE_PRIVATE) ? 1 : 0;
|
||||
ctype = get_cache_type(&ct.ci[0], level);
|
||||
if (ctype == CACHE_TYPE_SEPARATE) {
|
||||
ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_DATA, level);
|
||||
ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_INST, level);
|
||||
} else {
|
||||
rc = cache_add(level, private, ct.ci[level].type);
|
||||
ci_leaf_init(this_leaf++, pvt, ctype, level);
|
||||
}
|
||||
if (rc)
|
||||
goto error;
|
||||
}
|
||||
return;
|
||||
error:
|
||||
list_for_each_entry_safe(cache, next, &cache_list, list) {
|
||||
list_del(&cache->list);
|
||||
kfree(cache);
|
||||
}
|
||||
}
|
||||
|
||||
static struct cache_dir *cache_create_cache_dir(int cpu)
|
||||
{
|
||||
struct cache_dir *cache_dir;
|
||||
struct kobject *kobj = NULL;
|
||||
struct device *dev;
|
||||
|
||||
dev = get_cpu_device(cpu);
|
||||
if (!dev)
|
||||
goto out;
|
||||
kobj = kobject_create_and_add("cache", &dev->kobj);
|
||||
if (!kobj)
|
||||
goto out;
|
||||
cache_dir = kzalloc(sizeof(*cache_dir), GFP_KERNEL);
|
||||
if (!cache_dir)
|
||||
goto out;
|
||||
cache_dir->kobj = kobj;
|
||||
cache_dir_cpu[cpu] = cache_dir;
|
||||
return cache_dir;
|
||||
out:
|
||||
kobject_put(kobj);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct cache_index_dir *kobj_to_cache_index_dir(struct kobject *kobj)
|
||||
{
|
||||
return container_of(kobj, struct cache_index_dir, kobj);
|
||||
}
|
||||
|
||||
static void cache_index_release(struct kobject *kobj)
|
||||
{
|
||||
struct cache_index_dir *index;
|
||||
|
||||
index = kobj_to_cache_index_dir(kobj);
|
||||
kfree(index);
|
||||
}
|
||||
|
||||
static ssize_t cache_index_show(struct kobject *kobj,
|
||||
struct attribute *attr, char *buf)
|
||||
{
|
||||
struct kobj_attribute *kobj_attr;
|
||||
|
||||
kobj_attr = container_of(attr, struct kobj_attribute, attr);
|
||||
return kobj_attr->show(kobj, kobj_attr, buf);
|
||||
}
|
||||
|
||||
#define DEFINE_CACHE_ATTR(_name, _format, _value) \
|
||||
static ssize_t cache_##_name##_show(struct kobject *kobj, \
|
||||
struct kobj_attribute *attr, \
|
||||
char *buf) \
|
||||
{ \
|
||||
struct cache_index_dir *index; \
|
||||
\
|
||||
index = kobj_to_cache_index_dir(kobj); \
|
||||
return sprintf(buf, _format, _value); \
|
||||
} \
|
||||
static struct kobj_attribute cache_##_name##_attr = \
|
||||
__ATTR(_name, 0444, cache_##_name##_show, NULL);
|
||||
|
||||
DEFINE_CACHE_ATTR(size, "%luK\n", index->cache->size >> 10);
|
||||
DEFINE_CACHE_ATTR(coherency_line_size, "%u\n", index->cache->line_size);
|
||||
DEFINE_CACHE_ATTR(number_of_sets, "%u\n", index->cache->nr_sets);
|
||||
DEFINE_CACHE_ATTR(ways_of_associativity, "%u\n", index->cache->associativity);
|
||||
DEFINE_CACHE_ATTR(type, "%s\n", cache_type_string[index->cache->type]);
|
||||
DEFINE_CACHE_ATTR(level, "%d\n", index->cache->level);
|
||||
|
||||
static ssize_t shared_cpu_map_func(struct kobject *kobj, int type, char *buf)
|
||||
{
|
||||
struct cache_index_dir *index;
|
||||
int len;
|
||||
|
||||
index = kobj_to_cache_index_dir(kobj);
|
||||
len = type ?
|
||||
cpulist_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu)) :
|
||||
cpumask_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu));
|
||||
len += sprintf(&buf[len], "\n");
|
||||
return len;
|
||||
}
|
||||
|
||||
static ssize_t shared_cpu_map_show(struct kobject *kobj,
|
||||
struct kobj_attribute *attr, char *buf)
|
||||
{
|
||||
return shared_cpu_map_func(kobj, 0, buf);
|
||||
}
|
||||
static struct kobj_attribute cache_shared_cpu_map_attr =
|
||||
__ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL);
|
||||
|
||||
static ssize_t shared_cpu_list_show(struct kobject *kobj,
|
||||
struct kobj_attribute *attr, char *buf)
|
||||
{
|
||||
return shared_cpu_map_func(kobj, 1, buf);
|
||||
}
|
||||
static struct kobj_attribute cache_shared_cpu_list_attr =
|
||||
__ATTR(shared_cpu_list, 0444, shared_cpu_list_show, NULL);
|
||||
|
||||
static struct attribute *cache_index_default_attrs[] = {
|
||||
&cache_type_attr.attr,
|
||||
&cache_size_attr.attr,
|
||||
&cache_number_of_sets_attr.attr,
|
||||
&cache_ways_of_associativity_attr.attr,
|
||||
&cache_level_attr.attr,
|
||||
&cache_coherency_line_size_attr.attr,
|
||||
&cache_shared_cpu_map_attr.attr,
|
||||
&cache_shared_cpu_list_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static const struct sysfs_ops cache_index_ops = {
|
||||
.show = cache_index_show,
|
||||
};
|
||||
|
||||
static struct kobj_type cache_index_type = {
|
||||
.sysfs_ops = &cache_index_ops,
|
||||
.release = cache_index_release,
|
||||
.default_attrs = cache_index_default_attrs,
|
||||
};
|
||||
|
||||
static int cache_create_index_dir(struct cache_dir *cache_dir,
|
||||
struct cache *cache, int index, int cpu)
|
||||
{
|
||||
struct cache_index_dir *index_dir;
|
||||
int rc;
|
||||
|
||||
index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
|
||||
if (!index_dir)
|
||||
return -ENOMEM;
|
||||
index_dir->cache = cache;
|
||||
index_dir->cpu = cpu;
|
||||
rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
|
||||
cache_dir->kobj, "index%d", index);
|
||||
if (rc)
|
||||
goto out;
|
||||
index_dir->next = cache_dir->index;
|
||||
cache_dir->index = index_dir;
|
||||
return 0;
|
||||
out:
|
||||
kfree(index_dir);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int cache_add_cpu(int cpu)
|
||||
{
|
||||
struct cache_dir *cache_dir;
|
||||
struct cache *cache;
|
||||
int rc, index = 0;
|
||||
|
||||
if (list_empty(&cache_list))
|
||||
return 0;
|
||||
cache_dir = cache_create_cache_dir(cpu);
|
||||
if (!cache_dir)
|
||||
return -ENOMEM;
|
||||
list_for_each_entry(cache, &cache_list, list) {
|
||||
if (!cache->private)
|
||||
break;
|
||||
rc = cache_create_index_dir(cache_dir, cache, index, cpu);
|
||||
if (rc)
|
||||
return rc;
|
||||
index++;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cache_remove_cpu(int cpu)
|
||||
{
|
||||
struct cache_index_dir *index, *next;
|
||||
struct cache_dir *cache_dir;
|
||||
|
||||
cache_dir = cache_dir_cpu[cpu];
|
||||
if (!cache_dir)
|
||||
return;
|
||||
index = cache_dir->index;
|
||||
while (index) {
|
||||
next = index->next;
|
||||
kobject_put(&index->kobj);
|
||||
index = next;
|
||||
}
|
||||
kobject_put(cache_dir->kobj);
|
||||
kfree(cache_dir);
|
||||
cache_dir_cpu[cpu] = NULL;
|
||||
}
|
||||
|
||||
static int cache_hotplug(struct notifier_block *nfb, unsigned long action,
|
||||
void *hcpu)
|
||||
{
|
||||
int cpu = (long)hcpu;
|
||||
int rc = 0;
|
||||
|
||||
switch (action & ~CPU_TASKS_FROZEN) {
|
||||
case CPU_ONLINE:
|
||||
rc = cache_add_cpu(cpu);
|
||||
if (rc)
|
||||
cache_remove_cpu(cpu);
|
||||
break;
|
||||
case CPU_DEAD:
|
||||
cache_remove_cpu(cpu);
|
||||
break;
|
||||
}
|
||||
return rc ? NOTIFY_BAD : NOTIFY_OK;
|
||||
}
|
||||
|
||||
static int __init cache_init(void)
|
||||
{
|
||||
int cpu;
|
||||
|
||||
if (!test_facility(34))
|
||||
return 0;
|
||||
cache_build_info();
|
||||
|
||||
cpu_notifier_register_begin();
|
||||
for_each_online_cpu(cpu)
|
||||
cache_add_cpu(cpu);
|
||||
__hotcpu_notifier(cache_hotplug, 0);
|
||||
cpu_notifier_register_done();
|
||||
return 0;
|
||||
}
|
||||
device_initcall(cache_init);
|
||||
|
|
Loading…
Reference in New Issue